نتایج جستجو برای: fractal theories

تعداد نتایج: 143297  

Keyvan Karami Peyman Afzal,

The aim of this study was to identify various sulfidic mineralized zones in the Ghare-Tappeh Cu deposit (NW Iran) based on geo-electrical data including induced polarization (IP) and resistivity (RS) using the concentration-volume (C-V) and number-size (N-S) fractal models. The fractal models were used to separate high and moderate sulfidic zones from low sulfidic zones and barren wall rocks. B...

Journal: Geopersia 2018

The purpose of this study is to determine geochemical anomalies on lithogeochemical data from Ardestan area, Central Iran, using concentration-number (C-N) fractal modeling and staged factor analysis. Staged factor analysis is used to the recognition of genetic correlation and elimination of non-indicator elements in three steps. Factor scores of elements were calculated and geochemical data cl...

Journal: :Energy & Fuels 2022

Determining water occurrence in pore-fracture systems under specific saturation is of great significance to reveal the correlation between content and porosity/permeability coal reservoirs. In this work, simulation experiments intrusion drainage are used study micro-occurrence migration using NMR T2 T1–T2 techniques discuss influence system structure parameters on micro-occurrence. Meanwhile, d...

2009
Nirupam Roy Arnab K. Ray

Fractal concepts have been introduced in the accretion disc as a new feature. Due to the fractal nature of the flow, its continuity condition undergoes modifications. The conserved stationary fractal flow admits only saddle points and centre-type points in its phase portrait. Completely analytical solutions of the equilibrium point conditions indicate that the fractal properties enable the flow...

2008
Benoit Estienne

The second Z 3 parafermionic conformal theories are associated with the coset construction SU (2) k ×SU (2) 4 SU (2) k+4. Solid-on-solid integrable lattice models obtained by fusion of the model based on level-1 representation of the affine algebra B (1) 1 have a critical point described by these conformal theories. Explicit values for the Boltzmann weights are derived for these models, and it ...

2007
MARK J. EMBRECHTS

There are several methods for estimating the fractal dimension of a time series of data such as the box counting method and the correlation method [DeGrauwe, Dewachter and EmbrechtS, 1993] [peitgen and Saupe, 1988]. The application of these methods are often demanding in computing time and require expert interaction for interpreting the calculated fractal dimension. Artificial neural nets (ANN)...

2015
J. H. Wang

Fractal analysis has been applied in many fields since it was proposed by Mandelbrot in 1967. Fractal dimension is a basic parameter of fractal analysis. According to the difference of fractal dimensions for images, natural landscapes and urbanscapes could be differentiated, which is of great significance. In this paper, two methods were used for two types of landscape images to discuss the dif...

2008
Pinliang Dong

A multiscale approach to hyperspectral image data analysis using fractal signatures was proposed and implemented in the Interactive Data Language (IDL). For 2-D hyperspectral curves, fractal signature measures the changes in curve length with changing scale. Using NASA’s Earth Observing-1 (EO-1) Hyperion image from a study area near Denton, Texas, USA, the capabilities of fractal signatures in ...

2015
Marco Heinen Simon K. Schnyder John F. Brady Hartmut Löwen

We introduce fractal liquids by generalizing classical liquids of integer dimensions d = 1, 2, 3 to a fractal dimension df . The particles composing the liquid are fractal objects and their configuration space is also fractal, with the same non-integer dimension. Realizations of our generic model system include microphase separated binary liquids in porous media, and highly branched liquid drop...

Journal: :Scientific reports 2013
Dai-Jun Wei Qi Liu Hai-Xin Zhang Yong Hu Yong Deng Sankaran Mahadevan

Box-covering algorithm is a widely used method to measure the fractal dimension of complex networks. Existing researches mainly deal with the fractal dimension of unweighted networks. Here, the classical box covering algorithm is modified to deal with the fractal dimension of weighted networks. Box size length is obtained by accumulating the distance between two nodes connected directly and gra...

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